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Journal of Biological Sciences

Year: 2003 | Volume: 3 | Issue: 6 | Page No.: 585-590
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ABSTRACT

Certain features of gross morphology of the cotton plant furnish clues to earliness of crop production. Node of first fruiting branch (NFB), number of monopodial branch per plant (NMB), days taken to first flower, days taken to open first boll were used a morphological measures of earliness in the studies reported here. The estimation of component of variation for these characters suggested that the additive component was significant in all the traits and were greater than dominant components of variation except for seed cotton yield per plant, where the dominant components were higher in magnitude than additive. The ratio of H2/4H1 indicated asymmetry of positive and negative genes in parents for seed cotton yield and percent first pick, whereas symmetrical distribution of positive and negative genes in the parents was observed for node of first fruiting branch, number of monopodial branches per plant, days taken to first flower and days taken to open first boll. All of these traits were significantly correlated but because of its higher heritability and lower variability, node of first fruiting branch is considered the most reliable and the most practical one of these. NFB and NMB were significantly correlated phenotypically with percent first pick (earliness). From the estimates of heritability value (broad and narrow) sense it was concluded that cross Reshmi x NIAB-78, NIAB-78 x MNH-93 and S-14 x NIAB-78 are valuable crosses for improvement of early maturing traits (node of first fruiting branch, days taken to first flower, days taken to open first boll and percent first pick) with seed cotton yield.
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REFERENCES

  1. Gipson, J.R. and L.L. Ray, 1970. Temperature variety interrelationships in cotton. J. Agri. Sci., 73: 65-97.
  2. Babar, S.B., A.R. Soomro, R. Anjum, A.M. Memon and A.W. Soomro, 2002. Two preliminary reliable indicators of earliness in cotton-II. Asian J. Plant Sci., 1: 121-122.
    CrossRefDirect Link
  3. Godoy, A.S. and G.A. Palomo, 1999. Genetic analysis of earliness in upland cotton (G. hirsutum L.). II yield and lint percentage. Euphytica, 105: 161-166.
    CrossRefDirect Link
  4. Hayman, B.I., 1954. The theory and analysis of diallel crosses. Genetics, 39: 789-809.
    Direct Link
  5. Hayman, B.I., 1954. The analysis of variance of diallel tables. Biometrics, 10: 235-244.
    Direct Link
  6. Hayman. B.I., 1958. The theroy and analysis of diallel crosses. Genetics, 43: 63-85.
  7. Hearn, A.B., 1969. Growth and performance of cotton in a desert environment. J. Agric. Sci., 73: 65-97.
  8. Jain, D.K., 1980. Genetics of yield components and fiber characters in desi cotton (G. arboreum L.). M.Sc. Thesis, Haryana Agric. Univ. Hissar, India.
  9. Jinks, J.L., 1954. The analysis of continuous variation in a diallel cross of Nicotiana rustica varieties. Genetics, 39: 767-788.
    Direct Link
  10. Jinks, J.L., 1956. The F2 and backcross generation from a set of diallel crosses. Heridity, 10: 1-30.
    Direct Link
  11. Khan, M.A., A.S. Larik and Z.A. Soomro, 2002. Study of gene action for yield and yield components in Gossypium hirsutum L. Asian J. Plant Sci., 1: 130-131.
    CrossRefDirect Link
  12. Mahmud, I. and H.H. Kramer, 1951. Segregation for yield, height and maturity following a soybean cross. Agron. J., 43: 605-609.
    CrossRefDirect Link
  13. Ray, L.L. and T.R. Richmond, 1966. Morphological measures of earliness of crop maturity in cotton. Crop Sci., 6: 527-531.
  14. Richmond, T.R. and R.H. Radwan, 1962. A comparative study of seven methods of measuring earliness of crop maturity in cotton. Crop Sci., 2: 397-400.
  15. Warner, J.N., 1952. A method for estimating heritability. Agron. J., 44: 427-430.
    CrossRef
  16. Weijun, S., 1998. Research on the correlation between earliness and agronomic characters of upland in Xinjiang. China Cotton, 25: 17-18.

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